Volt will Use More than 8 kwh Battery Energy to Acheive EV Range Goal

[George S. Bower]

George
This will not be easily accomplished with a mere scan-gage or CAN appliance without detailed information on the GM Parameter ID structure. Most of the "generic" devices out there (including scan-gages) will monitor and display only basic OBDII and engine related items, many of which are SAE mandated. However after that things get a bit more proprietary with respect to GM's own "interpretation and implementation" of CAN known as GMLAN.
The EREV specific PIDs you are looking for are very likely spread out amongst the 28 networked modules the Volt employs to comprise it's GMLAN network/s.

The only tool solution guaranteed to delve into it all is the genuine article, the Multiple Diagnostic Interface (MDI) produced by Bosch for GM.
http://www.boschdiagnostics.com/TEST...PAGES/MDI.ASPX

The MDI combined with access/license subscription to GM's Global Diagnostic System software, (a GM version of Bosch ETAS) would IMO be the only reliable method of getting this data.
HTH
WopOnTour

I started a new thread in owners forum on diagnostic tools for those interested in that specific subject:

http://gm-volt.com/forum/showthread....4123#post44123

[WopOnTour]

A clamp-on integrating DC ammeter should do the trick..

http://www.powerstream.com/DC-clamp.htm

http://clampmultimeter.org/clamp-ammeter/

Herm
Besides battery current +/- were you not interested in SOC, voltage, cell temperature and TMS data as well? (in order to determine TMS efficiency which I thought this thread was focused.
Most of this type of data will either be held withing the Battery Energy Control Module (BECM) or perhaps one of the TWO Hybrid Powertrain Control Modues (HPCM1 and HPCM2) but I will have to check on that to be certain where this data resides.
WopOnTour

[WopOnTour]

I started a new thread in owners forum on diagnostic tools for those interested in that specific subject:

http://gm-volt.com/forum/showthread....4123#post44123

Roger that. But what types of hybrid specific data have the Prius crowd been able to obtain from a scan-gage? Again, my experience with consumer grade scan-gages/tools is limited. But I know there's at least a handful of control modules on the Prius (but a far cry from the Volt's 28) and without "help" (eg a leaked document of the CAN module and hardware layer commands) I cant see being able to do much more than read/clear DTCs from the engine ECU and perhaps some basic ICE parameters like RPM, coolant and air temps, manifold pressure, mass airflow- that kind of normal stuff. Likely very little regarding the HSD (unless of course they've gone out an purchased a Toyota Techstream cable and TIS subscription)
WOT

[Charles Whalen]

GM Director of Global Battery Systems Engineering Bill Wallace revealed within the last couple days that the Volt’s usable battery capacity is now 10.4 kWh, 65% of the 16 kWh total capacity, having been increased from the original 8 kWh usable capacity.

http://www.youtube.com/watch?v=G9VvH...layer_embedded